```json
{
  "name": "solsync-wallet",
  "version": "0.1.0",
  "private": true,
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start",
    "lint": "next lint"
  },
  "dependencies": {
    "next": "12.2.5",
    "react": "18.2.0",
    "react-dom": "18.2.0",
    "react-icons": "^4.4.0"
  },
  "devDependencies": {
    "autoprefixer": "^10.4.8",
    "eslint": "8.22.0",
    "eslint-config-next": "12.2.5",
    "postcss": "^8.4.16",
    "tailwindcss": "^3.1.8"
  }
}
```

To run this Next.js app:
1. Install dependencies: `npm install`
2. Run development server: `npm run dev`
3. Open http://localhost:3000 in your browser

Key changes made:
- Converted HTML to React components
- Replaced Feather icons with React Icons
- Implemented dark mode toggle
- Used Tailwind CSS for styling
- Created a single page app structure with Next.js
- Maintained all the original functionality including wallet connection and token listing